Magno
Thyroid
TSH on TRT
What the number means, why it moves on a protocol, and how it sits with related markers.
What it is
Thyroid stimulating hormone is the brain asking the thyroid for more. High TSH means the thyroid is falling behind; low TSH means it is being pushed, or hormone is coming from a pill.
The range
How to read the lab range
Labs quote about 0.4 to 4.5 mIU/L. Suppressed TSH on thyroid medication is expected.
Why it moves on a protocol
- Hard dieting and low calories push T3 down and TSH up.
- Thyroid medication suppresses it.
- Iodine or selenium running short.
- Plain hypothyroidism, unrelated to the protocol.
How Magno reads it
Magno keeps every test on one line, against your lab's range, with the change since last time. Pro explains it in plain words. Get Magno for iPhone.
Read yours
Drop your lab PDF or a photo and get every marker explained in plain words. Free, no account, your file never leaves your browser. Track it in the iPhone app to see the change since your last test.
Questions people ask
TSH high on a cut, is my thyroid broken?
Not necessarily. A big calorie deficit lowers active thyroid hormone and TSH can rise to compensate. Your doctor can tell a diet effect from thyroid disease.
Related markers
Not medical advice
This explains what the number is and why it moves. It is not medical advice; decisions belong to you and your clinician.